Vanessa Hudgens has reportedly expressed her anger following allegations that more nude photographs of her have surfaced online.

A private image of the High School Musical actress was leaked back in 2007, and reports have now suggested that more pictures from the same group are available.

In a statement to E!, her attorney said that the actress is "deeply upset" that old photographs appeared to have emerged online, adding that Hudgens is working with police to discover the source of the leak.

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Hudgens previously described the original photo leak as "unfortunate", branding the release of the private images "aggravating and frustrating".

"If anything, it makes it more embarrassing, because that was a private thing," she told Allure. "It's screwed up that someone screwed me over like that. At least some people are learning from my mistakes."

Last year, she admitted to Glamour that she was "still hurting" over the publication, but added that the ordeal had made her "stronger" as a person.

Hudgens can next be seen in Sucker Punch, which opens March 25 in the US and on April 1 in the UK.